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assistant-ui/update

將現有的 assistant-ui 專案升級至最新版本，並執行相應的遷移作業。當使用者想更新、升級、提升版本或遷移 @assistant-ui/react、@assistant-ui/react-ai-sdk、ai 或 @ai-sdk/react 時，遇到相依性衝突或升級後的型別錯誤，或是在版本跳躍後需套用重新命名的 API 時使用。

update 是什麼？

此技能專門用於升級已有的 assistant-ui 專案，確保其與最新版本相容。它會先透過 npm ls 與 npm view 偵測目前已安裝版本與最新版本，然後根據版本跳躍路徑（例如 AI SDK v4/v5 到 v6、assistant-ui 0.8.x 到 0.14.x）套用對應的重大變更參考。這些變更包括將 `useAssistantApi` 重新命名為 `useAui`、`runtime.threadList` 改為 `runtime.threads`、移除 `ThreadPrimitive.ViewportSlack`、將元件的 `components` prop 改為 `children` 渲染函式、`toDataStreamResponse` 改為 `toUIMessageStreamResponse`，以及將 `maxSteps` 改為 `stopWhen: stepCountIs(n)`。最後，它會執行 `npx assistant-ui@latest upgrade`、`pnpm/npm add @latest` 和 `npx tsc --noEmit` 來驗證升級是否成功。若使用者需要的是首次安裝或全新初始化（非升級），應使用 `assistant-ui/setup` 技能。

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npx skills add https://github.com/assistant-ui/skills/tree/main/skills/update
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說明文件

update 是做什麼的？

將現有的 assistant-ui 專案升級至最新版本，並執行相應的遷移作業。當使用者想更新、升級、提升版本或遷移 @assistant-ui/react、@assistant-ui/react-ai-sdk、ai 或 @ai-sdk/react 時，遇到相依性衝突或升級後的型別錯誤，或是在版本跳躍後需套用重新命名的 API 時使用。透過 npm ls / npm view 偵測已安裝版本與最新版本，然後根據每個版本跳躍路徑套用重大變更參考（AI SDK v4/v5 到 v6；assistant-ui 0.8.x 到 0.14.x）：useAssistantApi 改為 useAui、runtime.threadList 改為 runtime.threads、移除 ThreadPrimitive.ViewportSlack、將元件的 components prop 改為 children 渲染函式、toDataStreamResponse 改為 toUIMessageStreamResponse、maxSteps 改為 stopWhen: stepCountIs(n)。執行 npx assistant-ui@latest upgrade、pnpm/npm add @latest 和 npx tsc --noEmit 來驗證。若為首次安裝或全新初始化（非升級），請改用 setup。

Individual skills in this repo

This repo contains 7 individual skills — each has its own dedicated page.

assistant-ui/assistant-ui

Overview and router for assistant-ui, the React library for building AI chat interfaces from composable primitives. Use for high-level, cross-cutting, or architecture-overview questions: choosing packages, picking a runtime, or understanding the layered model (RuntimeCore, Runtime, context hooks, primitives) and message model. Covers the `@assistant-ui/react` core plus `@assistant-ui/react-ai-sdk`, `@assistant-ui/react-langgraph`, `assistant-stream`, and `assistant-cloud`; `AssistantRuntimeProvider`; the primitives `ThreadPrimitive`, `MessagePrimitive`, `ComposerPrimitive`; the hooks `useAui`, `useAuiState`, `useAuiEvent`; and runtime selection across `useChatRuntime`, `useExternalStoreRuntime`, `useLangGraphRuntime`, `useLocalRuntime`. For a specific area route to a focused sibling instead: setup, runtime, primitives, tools, streaming, cloud, thread-list, or update. Not for hands-on tasks already owned by those siblings.

assistant-ui/primitives

Builds and customizes assistant-ui chat UI from composable, unstyled @assistant-ui/react primitives that follow Radix-style part composition. Use when assembling or styling a custom Thread, Composer, message rendering, action bar, or branch picker from building blocks: ThreadPrimitive (.Root, .Viewport, .Messages, .Empty, .ScrollToBottom), ComposerPrimitive (.Input, .Send, .Cancel, .Attachments), MessagePrimitive (.Parts/.Content, .Error), ActionBarPrimitive (.Copy, .Edit, .Reload, .Speak, feedback, .ExportMarkdown), BranchPickerPrimitive, AttachmentPrimitive, ThreadListPrimitive, ThreadListItemPrimitive. Covers MessagePrimitive.Parts children render functions for text, image, reasoning, and tool-call parts; conditional rendering with AuiIf (deprecated .If); and gotchas like wrapping in AssistantRuntimeProvider and adding className since primitives ship unstyled. For prebuilt drop-in UI and scaffolding use setup; for multi-thread sidebar behavior use thread-list.

assistant-ui/runtime

Guide for assistant-ui runtime system and state management. Use when working with runtimes, accessing state, or managing thread/message data.

assistant-ui/setup

Installs and configures assistant-ui in a project via the CLI, and picks the right runtime for a backend. Use for first-time install, scaffold, or config: `npx assistant-ui@latest create my-app` (templates default, minimal, cloud, cloud-clerk, langgraph, mcp), `npx assistant-ui@latest init [--yes] [--overwrite]` in an existing Next.js app, or `npx assistant-ui@latest add` registry components (markdown-text, thread-list). Also use to choose a runtime hook for a backend: useChatRuntime (AI SDK), useLangGraphRuntime, useAgUiRuntime, useA2ARuntime, useLocalRuntime (custom streaming API), or useExternalStoreRuntime (Redux/Zustand). Covers Vite/TanStack Start setup, shadcn styling, the playground --preset flag, and avoiding the deprecated @assistant-ui/styles and @assistant-ui/react-ui packages. For upgrading an existing install or post-upgrade breakage use update; for building UI from raw parts use primitives.

assistant-ui/streaming

Streaming backends and wire protocols for assistant-ui via the assistant-stream package. Use when building a custom (non-AI-SDK) streaming endpoint with createAssistantStreamResponse or createAssistantStreamController, emitting parts through appendText/appendReasoning/appendSource/appendFile/addToolCallPart and setResponse; choosing between the AI SDK Data Stream format (toUIMessageStreamResponse) and the native Assistant Transport format; encoding or decoding streams with DataStreamEncoder/DataStreamDecoder, AssistantTransportEncoder/AssistantTransportDecoder, PlainTextEncoder, or UIMessageStreamDecoder; or wiring streamed chunks into useLocalRuntime or useChatRuntime. Use specifically for debugging stream wire issues: text-delta, part-start, result events, text/event-stream content-type, SSE format, tool calls not rendering, or partial text not showing. For general non-stream debugging route to the relevant focused skill, not the parent overview.

assistant-ui/thread-list

Implements multi-thread (conversation history) management in assistant-ui apps: rendering the prebuilt `ThreadList` next to `Thread`, or building a custom sidebar with `ThreadListPrimitive` and `ThreadListItemPrimitive` (Root, New, Items, Trigger, Title, Archive, Unarchive, Delete). Covers thread CRUD through the `useAui()`/`useAuiState()` API: `switchToThread`, `switchToNewThread`, and per item `rename`, `archive`, `unarchive`, `delete`, `generateTitle`, `initialize`, plus reading `s.threads.threadIds`/`archivedThreadIds`/`mainThreadId`. Includes cloud-backed persistence via `useChatRuntime` + `AssistantCloud` and a local `useRemoteThreadListRuntime` + `InMemoryThreadListAdapter` path. Use when a user wants a thread list/sidebar, switching, searching, sorting, drag-and-drop, or renaming/archiving/deleting conversations. For single-thread state, messages, or composer use runtime; for cloud auth/persistence setup use cloud.

assistant-ui/tools

Registers LLM tools and renders custom tool-call UI in assistant-ui (@assistant-ui/react). Use when adding frontend-only tools with makeAssistantTool / useAssistantTool (browser actions like clipboard, navigation, localStorage, async-generator streaming, AbortSignal), rendering backend AI SDK tool() calls with makeAssistantToolUI / useAssistantToolUI (status.type running/complete/incomplete/requires-action, args, result, artifact via ToolCallMessagePartProps), building generative UI from tool results, or implementing human-in-the-loop and approval flows (addResult, resume with context.human(), respondToApproval for server-side needsApproval gates). Covers registering tool components inside AssistantRuntimeProvider and the case-sensitive toolName matching that connects a tool to its UI. Reach for this when tool UI is not rendering, a tool is not being called, or a result is not showing.

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